|Date|Championship|Location|Category|Surface|Prev. result|Prev. points|New points|Outcome|
|---|---|---|---|---|---|---|---|---|
|29 December 2013– 5 January 2014|Brisbane International|Brisbane (AUS)|WTA Premier|Hard|SF|200|305|Final Lost to Serena Williams 4–6, 5–7|
|14 January 2014– 27 January 2014|Australian Open|Melbourne (AUS)|Grand Slam|Hard|W|2000|430|Quarter-finals Lost to Agnieszka Radwańska 1–6, 7–5, 0–6|
|10 February 2014– 16 February 2014|Qatar Total Open|Doha (QAT)|WTA Premier 5|Hard|W|900|0|Withdrew due to left foot injury|
|3 March 2014– 16 March 2014|Indian Wells|Indian Wells (USA)|WTA Premier Mandatory|Hard|QF|250|45|Second round Lost to Lauren Davis 0–6, 6–7(2–7)|
|17 March 2013– 30 March 2014|Sony Open Tennis|Miami (USA)|WTA Premier Mandatory|Hard|DNP|0|0|Withdrew due to left foot injury|
|5 May 2014– 11 May 2014|Mutua Madrid Masters|Madrid (ESP)|WTA Premier Mandatory|Clay|2R|60|TBD|Pending|
|12 May 2014– 18 May 2014|Internazionali BNL d'Italia|Rome (ITA)|WTA Premier 5|Clay|F|700|TBD|Pending|
|25 May 2014– 8 June 2014|French Open|Paris (FRA)|Grand Slam|Clay|SF|900|TBD|Pending|
|23 June 2014– 6 July 2014|Wimbledon|London (GBR)|Grand Slam|Grass|2R|100|TBD|Pending|
|4 August 2014– 10 August 2014|Rogers Cup|Toronto (CAN)|WTA Premier 5|Hard|DNP|0|TBD|Pending|
|11 August 2014– 17 August 2014|Western and Southern Open|Cincinnati (USA)|WTA Premier 5|Hard|W|900|TBD|Pending|
|25 August 2014– 8 September 2014|US Open|New York (USA)|Grand Slam|Hard|F|1400|TBD|Pending|
|22 September 2014– 27 September 2014|Toray Pan Pacific Open|Wuhan (CHN)|WTA Premier 5|Hard|2R|60|TBD|Pending|
|27 September 2014– 5 October 2014|China Open|Beijing (CHN)|WTA Premier Mandatory|Hard|1R|5|TBD|Pending|
|20 October 2013– 26 October 2014|WTA Tour Championships|Singapore (SIN)|WTA Tour Championships|Hard (i)|RR|400|TBD|Pending|

Question: how many championships had at most 900 previous points.
Answer: 13